In general, narrow bandwidths should be chosen if the signal to be analyzed does not have quick frequency modulations and if there is no important information in the time domain. (Rectangular, Bartlett), Hamming, Hann, Blackman, Gauss 3.0, Kaiser-Bessel, FlatTop The following list is sorted by ascending bandwidths: The largest bandwidth gives the FlatTop window. So the lowest bandwidth can be achieved with the Hamming window. Because of the unacceptable leakeage effect (bad selectivity and spurious frequency components depending on the signal frequency the rectangualar and Bartlett window should not be used for standard applications. The smallest bandwidth is realized with the rectangular window. The window type also influences the bandwidth. The bandwidth is usually higher than the resolution and is influenced by the frame size and the window type.Įffect of spectrogram parameters to spectrogram bandwidth and time constant Parameter modification The spectrogram bandwidth is not the same as the frequency resolution of the digital spectrogram matrix. The total height of the spectrogram matrix is equal to one half of the FFT-Length. The width of a pixel is the temporal resolution displayed in the spectrogram parameters dialog.

The height of such a pixel is the frequency resolution. Each amplitude of that matrix corresponds to a single pixel (picture element) of the spectrogram image. The digital spectrogram is a matrix of amplitudes. When a spectrogram is generated, several parameters (FFT-Length, Frame size, Window type and Overlap) selected from the “Analyze/Spectrogram Parameters” command can be modified in order to get the desired time / frequency resolution and bandwidth of the spectrogram. Selecting appropriate spectrogram parameters Bat echolocation and communication calls.Ultrasonic vocalizations in laboratory rats and mice.Common audio recording (50 Hz … 20 kHz).Counting and measuring USV’s in real-time.Recording and analyzing rat or mouse USV’s.Automatically measuring sound parameters.

Music spectrograph frequency